trait DomainTopologyClient extends TopologyClientApi[TopologySnapshot] with AutoCloseable
The client that provides the topology information on a per domain basis
- Self Type
- DomainTopologyClient with HasFutureSupervision
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- abstract def approximateTimestamp: CantonTimestamp
The approximate timestamp
The approximate timestamp
This is either the last observed sequencer timestamp OR the effective timestamp after we observed the time difference of (effective - sequencer = epsilon) to elapse
- Definition Classes
- TopologyClientApi
- abstract def await(condition: (TopologySnapshot) => Future[Boolean], timeout: Duration)(implicit traceContext: TraceContext): FutureUnlessShutdown[Boolean]
Wait for a condition to become true according to the current snapshot approximation
Wait for a condition to become true according to the current snapshot approximation
- returns
true if the condition became true, false if it timed out
- abstract def awaitSnapshot(timestamp: CantonTimestamp)(implicit traceContext: TraceContext): Future[TopologySnapshot]
Waits until a snapshot is available
Waits until a snapshot is available
The snapshot returned by this method should be used for validating transaction and transfer requests (Phase 2 - 7). Use the request timestamp as parameter for this method. Do not use a response or result timestamp, because all validation steps must use the same topology snapshot.
- Definition Classes
- TopologyClientApi
- abstract def awaitSnapshotUS(timestamp: CantonTimestamp)(implicit traceContext: TraceContext): FutureUnlessShutdown[TopologySnapshot]
Shutdown safe version of await snapshot
Shutdown safe version of await snapshot
- Definition Classes
- TopologyClientApi
- abstract def awaitTimestamp(timestamp: CantonTimestamp, waitForEffectiveTime: Boolean)(implicit traceContext: TraceContext): Option[Future[Unit]]
Returns an optional future which will complete when the timestamp has been observed
Returns an optional future which will complete when the timestamp has been observed
If the timestamp is already observed, we return None.
Note that this function allows to wait for effective time (true) and sequenced time (false). If we wait for effective time, we wait until the topology snapshot for that given point in time is known. As we future date topology transactions (to avoid bottlenecks), this might be before we actually observed a sequencing timestamp.
- Definition Classes
- TopologyClientApi
- abstract def awaitTimestampUS(timestamp: CantonTimestamp, waitForEffectiveTime: Boolean)(implicit traceContext: TraceContext): Option[FutureUnlessShutdown[Unit]]
- Definition Classes
- TopologyClientApi
- abstract def close(): Unit
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- abstract def currentSnapshotApproximation(implicit traceContext: TraceContext): TopologySnapshot
Our current snapshot approximation
Our current snapshot approximation
As topology transactions are future dated (to prevent sequential bottlenecks), we do have to "guess" the current state, as time is defined by the sequencer after we've sent the transaction. Therefore, this function will return the best snapshot approximation known.
The snapshot returned by this method should be used when preparing a transaction or transfer request (Phase 1). It must not be used when validating a request (Phase 2 - 7); instead, use one of the
snapshot
methods with the request timestamp.- Definition Classes
- TopologyClientApi
- abstract def domainId: DomainId
The domain this client applies to
The domain this client applies to
- Definition Classes
- TopologyClientApi
- abstract def snapshot(timestamp: CantonTimestamp)(implicit traceContext: TraceContext): Future[TopologySnapshot]
Returns the topology information at a certain point in time
Returns the topology information at a certain point in time
Use this method if you are sure to be synchronized with the topology state updates. The method will block & wait for an update, but emit a warning if it is not available
The snapshot returned by this method should be used for validating transaction and transfer requests (Phase 2 - 7). Use the request timestamp as parameter for this method. Do not use a response or result timestamp, because all validation steps must use the same topology snapshot.
- Definition Classes
- TopologyClientApi
- abstract def snapshotAvailable(timestamp: CantonTimestamp): Boolean
Returns true if the topology information at the passed timestamp is already known
Returns true if the topology information at the passed timestamp is already known
- Definition Classes
- TopologyClientApi
- abstract def snapshotUS(timestamp: CantonTimestamp)(implicit traceContext: TraceContext): FutureUnlessShutdown[TopologySnapshot]
- Definition Classes
- TopologyClientApi
- abstract def topologyKnownUntilTimestamp: CantonTimestamp
The most recently observed effective timestamp
The most recently observed effective timestamp
The effective timestamp is sequencer_time + epsilon(sequencer_time), where epsilon is given by the topology change delay time, defined using the domain parameters.
This is the highest timestamp for which we can serve snapshots
- Definition Classes
- TopologyClientApi
- abstract def trySnapshot(timestamp: CantonTimestamp)(implicit traceContext: TraceContext): TopologySnapshot
Returns the topology information at a certain point in time
Returns the topology information at a certain point in time
Fails with an exception if the state is not yet known.
The snapshot returned by this method should be used for validating transaction and transfer requests (Phase 2 - 7). Use the request timestamp as parameter for this method. Do not use a response or result timestamp, because all validation steps must use the same topology snapshot.
- Definition Classes
- TopologyClientApi
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- def awaitSnapshotSupervised(description: => String, warnAfter: Duration = 30.seconds)(timestamp: CantonTimestamp)(implicit traceContext: TraceContext): Future[TopologySnapshot]
Supervised version of awaitSnapshot
Supervised version of awaitSnapshot
- Definition Classes
- TopologyClientApi
- def awaitSnapshotUSSupervised(description: => String, warnAfter: Duration = 30.seconds)(timestamp: CantonTimestamp)(implicit traceContext: TraceContext): FutureUnlessShutdown[TopologySnapshot]
Supervised version of awaitSnapshotUS
Supervised version of awaitSnapshotUS
- Definition Classes
- TopologyClientApi
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- def headSnapshot(implicit traceContext: TraceContext): TopologySnapshot
Possibly future dated head snapshot
Possibly future dated head snapshot
As we future date topology transactions, the head snapshot is our latest knowledge of the topology state, but as it can be still future dated, we need to be careful when actually using it: the state might not yet be active, as the topology transactions are future dated. Therefore, do not act towards the sequencer using this snapshot, but use the currentSnapshotApproximation instead.
- Definition Classes
- TopologyClientApi
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